--- jsr166/src/test/tck/DelayQueueTest.java 2009/11/21 10:29:50 1.21 +++ jsr166/src/test/tck/DelayQueueTest.java 2015/01/02 03:52:53 1.67 @@ -1,72 +1,80 @@ /* * Written by Doug Lea with assistance from members of JCP JSR-166 * Expert Group and released to the public domain, as explained at - * http://creativecommons.org/licenses/publicdomain + * http://creativecommons.org/publicdomain/zero/1.0/ * Other contributors include Andrew Wright, Jeffrey Hayes, * Pat Fisher, Mike Judd. */ -import junit.framework.*; -import java.util.*; import static java.util.concurrent.TimeUnit.MILLISECONDS; -import java.util.concurrent.*; + +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collection; +import java.util.Iterator; +import java.util.NoSuchElementException; +import java.util.concurrent.BlockingQueue; +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.Delayed; +import java.util.concurrent.DelayQueue; +import java.util.concurrent.Executors; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.TimeUnit; + +import junit.framework.Test; public class DelayQueueTest extends JSR166TestCase { + + public static class Generic extends BlockingQueueTest { + protected BlockingQueue emptyCollection() { + return new DelayQueue(); + } + protected PDelay makeElement(int i) { + return new PDelay(i); + } + } + public static void main(String[] args) { - junit.textui.TestRunner.run (suite()); + junit.textui.TestRunner.run(suite()); } public static Test suite() { - return new TestSuite(DelayQueueTest.class); + return newTestSuite(DelayQueueTest.class, + new Generic().testSuite()); } private static final int NOCAP = Integer.MAX_VALUE; /** * A delayed implementation for testing. - * Most tests use Pseudodelays, where delays are all elapsed + * Most tests use Pseudodelays, where delays are all elapsed * (so, no blocking solely for delays) but are still ordered */ static class PDelay implements Delayed { int pseudodelay; - PDelay(int i) { pseudodelay = Integer.MIN_VALUE + i; } - public int compareTo(PDelay y) { - int i = pseudodelay; - int j = ((PDelay)y).pseudodelay; - if (i < j) return -1; - if (i > j) return 1; - return 0; + PDelay(int i) { pseudodelay = i; } + public int compareTo(PDelay other) { + int a = this.pseudodelay; + int b = other.pseudodelay; + return (a < b) ? -1 : (a > b) ? 1 : 0; } - public int compareTo(Delayed y) { - int i = pseudodelay; - int j = ((PDelay)y).pseudodelay; - if (i < j) return -1; - if (i > j) return 1; - return 0; + return compareTo((PDelay)y); } - public boolean equals(Object other) { - return ((PDelay)other).pseudodelay == pseudodelay; - } - public boolean equals(PDelay other) { - return ((PDelay)other).pseudodelay == pseudodelay; + return (other instanceof PDelay) && + this.pseudodelay == ((PDelay)other).pseudodelay; } - - + // suppress [overrides] javac warning + public int hashCode() { return pseudodelay; } public long getDelay(TimeUnit ignore) { - return pseudodelay; - } - public int intValue() { - return pseudodelay; + return Integer.MIN_VALUE + pseudodelay; } - public String toString() { return String.valueOf(pseudodelay); } } - /** * Delayed implementation that actually delays */ @@ -77,27 +85,26 @@ public class DelayQueueTest extends JSR1 } public int compareTo(NanoDelay y) { long i = trigger; - long j = ((NanoDelay)y).trigger; + long j = y.trigger; if (i < j) return -1; if (i > j) return 1; return 0; } public int compareTo(Delayed y) { - long i = trigger; - long j = ((NanoDelay)y).trigger; - if (i < j) return -1; - if (i > j) return 1; - return 0; + return compareTo((NanoDelay)y); } public boolean equals(Object other) { - return ((NanoDelay)other).trigger == trigger; + return equals((NanoDelay)other); } public boolean equals(NanoDelay other) { - return ((NanoDelay)other).trigger == trigger; + return other.trigger == trigger; } + // suppress [overrides] javac warning + public int hashCode() { return (int) trigger; } + public long getDelay(TimeUnit unit) { long n = trigger - System.nanoTime(); return unit.convert(n, TimeUnit.NANOSECONDS); @@ -112,17 +119,16 @@ public class DelayQueueTest extends JSR1 } } - /** - * Create a queue of given size containing consecutive + * Returns a new queue of given size containing consecutive * PDelays 0 ... n. */ - private DelayQueue populatedQueue(int n) { - DelayQueue q = new DelayQueue(); + private DelayQueue populatedQueue(int n) { + DelayQueue q = new DelayQueue(); assertTrue(q.isEmpty()); - for (int i = n-1; i >= 0; i-=2) + for (int i = n-1; i >= 0; i -= 2) assertTrue(q.offer(new PDelay(i))); - for (int i = (n & 1); i < n; i+=2) + for (int i = (n & 1); i < n; i += 2) assertTrue(q.offer(new PDelay(i))); assertFalse(q.isEmpty()); assertEquals(NOCAP, q.remainingCapacity()); @@ -199,7 +205,7 @@ public class DelayQueueTest extends JSR1 } /** - * remainingCapacity does not change when elementa added or removed, + * remainingCapacity does not change when elements added or removed, * but size does */ public void testRemainingCapacity() { @@ -217,28 +223,6 @@ public class DelayQueueTest extends JSR1 } /** - * offer(null) throws NPE - */ - public void testOfferNull() { - try { - DelayQueue q = new DelayQueue(); - q.offer(null); - shouldThrow(); - } catch (NullPointerException success) {} - } - - /** - * add(null) throws NPE - */ - public void testAddNull() { - try { - DelayQueue q = new DelayQueue(); - q.add(null); - shouldThrow(); - } catch (NullPointerException success) {} - } - - /** * offer non-null succeeds */ public void testOffer() { @@ -259,18 +243,6 @@ public class DelayQueueTest extends JSR1 } /** - * addAll(null) throws NPE - */ - public void testAddAll1() { - try { - DelayQueue q = new DelayQueue(); - q.addAll(null); - shouldThrow(); - } catch (NullPointerException success) {} - } - - - /** * addAll(this) throws IAE */ public void testAddAllSelf() { @@ -282,17 +254,6 @@ public class DelayQueueTest extends JSR1 } /** - * addAll of a collection with null elements throws NPE - */ - public void testAddAll2() { - try { - DelayQueue q = new DelayQueue(); - PDelay[] ints = new PDelay[SIZE]; - q.addAll(Arrays.asList(ints)); - shouldThrow(); - } catch (NullPointerException success) {} - } - /** * addAll of a collection with any null elements throws NPE after * possibly adding some elements */ @@ -323,27 +284,16 @@ public class DelayQueueTest extends JSR1 } /** - * put(null) throws NPE - */ - public void testPutNull() { - try { - DelayQueue q = new DelayQueue(); - q.put(null); - shouldThrow(); - } catch (NullPointerException success) {} - } - - /** * all elements successfully put are contained */ - public void testPut() { - DelayQueue q = new DelayQueue(); - for (int i = 0; i < SIZE; ++i) { - PDelay I = new PDelay(i); - q.put(I); - assertTrue(q.contains(I)); - } - assertEquals(SIZE, q.size()); + public void testPut() { + DelayQueue q = new DelayQueue(); + for (int i = 0; i < SIZE; ++i) { + PDelay x = new PDelay(i); + q.put(x); + assertTrue(q.contains(x)); + } + assertEquals(SIZE, q.size()); } /** @@ -351,7 +301,7 @@ public class DelayQueueTest extends JSR1 */ public void testPutWithTake() throws InterruptedException { final DelayQueue q = new DelayQueue(); - Thread t = new Thread(new CheckedRunnable() { + Thread t = newStartedThread(new CheckedRunnable() { public void realRun() { q.put(new PDelay(0)); q.put(new PDelay(0)); @@ -359,11 +309,8 @@ public class DelayQueueTest extends JSR1 q.put(new PDelay(0)); }}); - t.start(); - Thread.sleep(SHORT_DELAY_MS); - q.take(); - t.interrupt(); - t.join(); + awaitTermination(t); + assertEquals(4, q.size()); } /** @@ -371,18 +318,15 @@ public class DelayQueueTest extends JSR1 */ public void testTimedOffer() throws InterruptedException { final DelayQueue q = new DelayQueue(); - Thread t = new Thread(new CheckedRunnable() { + Thread t = newStartedThread(new CheckedRunnable() { public void realRun() throws InterruptedException { q.put(new PDelay(0)); q.put(new PDelay(0)); - threadAssertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, MILLISECONDS)); - threadAssertTrue(q.offer(new PDelay(0), LONG_DELAY_MS, MILLISECONDS)); + assertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, MILLISECONDS)); + assertTrue(q.offer(new PDelay(0), LONG_DELAY_MS, MILLISECONDS)); }}); - t.start(); - Thread.sleep(SMALL_DELAY_MS); - t.interrupt(); - t.join(); + awaitTermination(t); } /** @@ -391,77 +335,79 @@ public class DelayQueueTest extends JSR1 public void testTake() throws InterruptedException { DelayQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(new PDelay(i), ((PDelay)q.take())); + assertEquals(new PDelay(i), q.take()); } } /** - * take blocks interruptibly when empty - */ - public void testTakeFromEmpty() throws InterruptedException { - final DelayQueue q = new DelayQueue(); - Thread t = new ThreadShouldThrow(InterruptedException.class) { - public void realRun() throws InterruptedException { - q.take(); - }}; - - t.start(); - Thread.sleep(SHORT_DELAY_MS); - t.interrupt(); - t.join(); - } - - /** * Take removes existing elements until empty, then blocks interruptibly */ public void testBlockingTake() throws InterruptedException { - Thread t = new ThreadShouldThrow(InterruptedException.class) { + final DelayQueue q = populatedQueue(SIZE); + final CountDownLatch pleaseInterrupt = new CountDownLatch(1); + Thread t = newStartedThread(new CheckedRunnable() { public void realRun() throws InterruptedException { - DelayQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - threadAssertEquals(new PDelay(i), ((PDelay)q.take())); + assertEquals(new PDelay(i), ((PDelay)q.take())); } - q.take(); - }}; - t.start(); - Thread.sleep(SHORT_DELAY_MS); + Thread.currentThread().interrupt(); + try { + q.take(); + shouldThrow(); + } catch (InterruptedException success) {} + assertFalse(Thread.interrupted()); + + pleaseInterrupt.countDown(); + try { + q.take(); + shouldThrow(); + } catch (InterruptedException success) {} + assertFalse(Thread.interrupted()); + }}); + + await(pleaseInterrupt); + assertThreadStaysAlive(t); t.interrupt(); - t.join(); + awaitTermination(t); } - /** * poll succeeds unless empty */ public void testPoll() { DelayQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(new PDelay(i), ((PDelay)q.poll())); + assertEquals(new PDelay(i), q.poll()); } assertNull(q.poll()); } /** - * timed pool with zero timeout succeeds when non-empty, else times out + * timed poll with zero timeout succeeds when non-empty, else times out */ public void testTimedPoll0() throws InterruptedException { DelayQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(new PDelay(i), ((PDelay)q.poll(0, MILLISECONDS))); + assertEquals(new PDelay(i), q.poll(0, MILLISECONDS)); } assertNull(q.poll(0, MILLISECONDS)); } /** - * timed pool with nonzero timeout succeeds when non-empty, else times out + * timed poll with nonzero timeout succeeds when non-empty, else times out */ public void testTimedPoll() throws InterruptedException { DelayQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, MILLISECONDS))); - } - assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); + long startTime = System.nanoTime(); + assertEquals(new PDelay(i), q.poll(LONG_DELAY_MS, MILLISECONDS)); + assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); + } + long startTime = System.nanoTime(); + assertNull(q.poll(timeoutMillis(), MILLISECONDS)); + assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); + checkEmpty(q); } /** @@ -469,60 +415,47 @@ public class DelayQueueTest extends JSR1 * returning timeout status */ public void testInterruptedTimedPoll() throws InterruptedException { - Thread t = new Thread(new CheckedRunnable() { + final CountDownLatch pleaseInterrupt = new CountDownLatch(1); + Thread t = newStartedThread(new CheckedRunnable() { public void realRun() throws InterruptedException { DelayQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { assertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, MILLISECONDS))); } + + Thread.currentThread().interrupt(); try { q.poll(LONG_DELAY_MS, MILLISECONDS); shouldThrow(); } catch (InterruptedException success) {} - }}); - - t.start(); - Thread.sleep(SHORT_DELAY_MS); - t.interrupt(); - t.join(); - } + assertFalse(Thread.interrupted()); - /** - * timed poll before a delayed offer fails; after offer succeeds; - * on interruption throws - */ - public void testTimedPollWithOffer() throws InterruptedException { - final DelayQueue q = new DelayQueue(); - Thread t = new Thread(new CheckedRunnable() { - public void realRun() throws InterruptedException { - assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); - q.poll(LONG_DELAY_MS, MILLISECONDS); + pleaseInterrupt.countDown(); try { q.poll(LONG_DELAY_MS, MILLISECONDS); shouldThrow(); } catch (InterruptedException success) {} + assertFalse(Thread.interrupted()); }}); - t.start(); - Thread.sleep(SMALL_DELAY_MS); - assertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, MILLISECONDS)); + await(pleaseInterrupt); + assertThreadStaysAlive(t); t.interrupt(); - t.join(); + awaitTermination(t); } - /** * peek returns next element, or null if empty */ public void testPeek() { DelayQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(new PDelay(i), ((PDelay)q.peek())); - q.poll(); + assertEquals(new PDelay(i), q.peek()); + assertEquals(new PDelay(i), q.poll()); if (q.isEmpty()) assertNull(q.peek()); else - assertTrue(i != ((PDelay)q.peek()).intValue()); + assertFalse(new PDelay(i).equals(q.peek())); } assertNull(q.peek()); } @@ -533,7 +466,7 @@ public class DelayQueueTest extends JSR1 public void testElement() { DelayQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(new PDelay(i), ((PDelay)q.element())); + assertEquals(new PDelay(i), q.element()); q.poll(); } try { @@ -548,7 +481,7 @@ public class DelayQueueTest extends JSR1 public void testRemove() { DelayQueue q = populatedQueue(SIZE); for (int i = 0; i < SIZE; ++i) { - assertEquals(new PDelay(i), ((PDelay)q.remove())); + assertEquals(new PDelay(i), q.remove()); } try { q.remove(); @@ -557,21 +490,6 @@ public class DelayQueueTest extends JSR1 } /** - * remove(x) removes x and returns true if present - */ - public void testRemoveElement() { - DelayQueue q = populatedQueue(SIZE); - for (int i = 1; i < SIZE; i+=2) { - assertTrue(q.remove(new PDelay(i))); - } - for (int i = 0; i < SIZE; i+=2) { - assertTrue(q.remove(new PDelay(i))); - assertFalse(q.remove(new PDelay(i+1))); - } - assertTrue(q.isEmpty()); - } - - /** * contains(x) reports true when elements added but not yet removed */ public void testContains() { @@ -643,8 +561,8 @@ public class DelayQueueTest extends JSR1 assertTrue(q.removeAll(p)); assertEquals(SIZE-i, q.size()); for (int j = 0; j < i; ++j) { - PDelay I = (PDelay)(p.remove()); - assertFalse(q.contains(I)); + PDelay x = (PDelay)(p.remove()); + assertFalse(q.contains(x)); } } } @@ -657,40 +575,29 @@ public class DelayQueueTest extends JSR1 Object[] o = q.toArray(); Arrays.sort(o); for (int i = 0; i < o.length; i++) - assertEquals(o[i], q.take()); + assertSame(o[i], q.take()); } /** * toArray(a) contains all elements */ - public void testToArray2() throws InterruptedException { - DelayQueue q = populatedQueue(SIZE); + public void testToArray2() { + DelayQueue q = populatedQueue(SIZE); PDelay[] ints = new PDelay[SIZE]; - ints = (PDelay[])q.toArray(ints); + PDelay[] array = q.toArray(ints); + assertSame(ints, array); Arrays.sort(ints); for (int i = 0; i < ints.length; i++) - assertEquals(ints[i], q.take()); - } - - - /** - * toArray(null) throws NPE - */ - public void testToArray_BadArg() { - try { - DelayQueue q = populatedQueue(SIZE); - Object o[] = q.toArray(null); - shouldThrow(); - } catch (NullPointerException success) {} + assertSame(ints[i], q.remove()); } /** - * toArray with incompatible array type throws CCE + * toArray(incompatible array type) throws ArrayStoreException */ public void testToArray1_BadArg() { + DelayQueue q = populatedQueue(SIZE); try { - DelayQueue q = populatedQueue(SIZE); - Object o[] = q.toArray(new String[10] ); + q.toArray(new String[10]); shouldThrow(); } catch (ArrayStoreException success) {} } @@ -712,7 +619,7 @@ public class DelayQueueTest extends JSR1 /** * iterator.remove removes current element */ - public void testIteratorRemove () { + public void testIteratorRemove() { final DelayQueue q = new DelayQueue(); q.add(new PDelay(2)); q.add(new PDelay(1)); @@ -721,69 +628,63 @@ public class DelayQueueTest extends JSR1 it.next(); it.remove(); it = q.iterator(); - assertEquals(it.next(), new PDelay(2)); - assertEquals(it.next(), new PDelay(3)); + assertEquals(new PDelay(2), it.next()); + assertEquals(new PDelay(3), it.next()); assertFalse(it.hasNext()); } - /** * toString contains toStrings of elements */ public void testToString() { DelayQueue q = populatedQueue(SIZE); String s = q.toString(); - for (int i = 0; i < SIZE; ++i) { - assertTrue(s.indexOf(String.valueOf(Integer.MIN_VALUE+i)) >= 0); - } + for (Object e : q) + assertTrue(s.contains(e.toString())); } /** - * offer transfers elements across Executor tasks + * timed poll transfers elements across Executor tasks */ public void testPollInExecutor() { final DelayQueue q = new DelayQueue(); + final CheckedBarrier threadsStarted = new CheckedBarrier(2); ExecutorService executor = Executors.newFixedThreadPool(2); executor.execute(new CheckedRunnable() { public void realRun() throws InterruptedException { - threadAssertNull(q.poll()); - threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS)); - threadAssertTrue(q.isEmpty()); + assertNull(q.poll()); + threadsStarted.await(); + assertNotNull(q.poll(LONG_DELAY_MS, MILLISECONDS)); + checkEmpty(q); }}); executor.execute(new CheckedRunnable() { public void realRun() throws InterruptedException { - Thread.sleep(SHORT_DELAY_MS); + threadsStarted.await(); q.put(new PDelay(1)); }}); joinPool(executor); - } - /** * Delayed actions do not occur until their delay elapses */ public void testDelay() throws InterruptedException { - DelayQueue q = new DelayQueue(); - NanoDelay[] elements = new NanoDelay[SIZE]; - for (int i = 0; i < SIZE; ++i) { - elements[i] = new NanoDelay(1000000000L + 1000000L * (SIZE - i)); - } - for (int i = 0; i < SIZE; ++i) { - q.add(elements[i]); - } + DelayQueue q = new DelayQueue(); + for (int i = 0; i < SIZE; ++i) + q.add(new NanoDelay(1000000L * (SIZE - i))); long last = 0; for (int i = 0; i < SIZE; ++i) { - NanoDelay e = (NanoDelay)(q.take()); + NanoDelay e = q.take(); long tt = e.getTriggerTime(); - assertTrue(tt <= System.nanoTime()); + assertTrue(System.nanoTime() - tt >= 0); if (i != 0) assertTrue(tt >= last); last = tt; } + assertTrue(q.isEmpty()); } /** @@ -792,10 +693,9 @@ public class DelayQueueTest extends JSR1 public void testPeekDelayed() { DelayQueue q = new DelayQueue(); q.add(new NanoDelay(Long.MAX_VALUE)); - assert(q.peek() != null); + assertNotNull(q.peek()); } - /** * poll of a non-empty queue returns null if no expired elements. */ @@ -811,29 +711,7 @@ public class DelayQueueTest extends JSR1 public void testTimedPollDelayed() throws InterruptedException { DelayQueue q = new DelayQueue(); q.add(new NanoDelay(LONG_DELAY_MS * 1000000L)); - assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); - } - - /** - * drainTo(null) throws NPE - */ - public void testDrainToNull() { - DelayQueue q = populatedQueue(SIZE); - try { - q.drainTo(null); - shouldThrow(); - } catch (NullPointerException success) {} - } - - /** - * drainTo(this) throws IAE - */ - public void testDrainToSelf() { - DelayQueue q = populatedQueue(SIZE); - try { - q.drainTo(q); - shouldThrow(); - } catch (IllegalArgumentException success) {} + assertNull(q.poll(timeoutMillis(), MILLISECONDS)); } /** @@ -848,9 +726,9 @@ public class DelayQueueTest extends JSR1 } ArrayList l = new ArrayList(); q.drainTo(l); - assertEquals(q.size(), 0); + assertEquals(0, q.size()); for (int i = 0; i < SIZE; ++i) - assertEquals(l.get(i), elems[i]); + assertEquals(elems[i], l.get(i)); q.add(elems[0]); q.add(elems[1]); assertFalse(q.isEmpty()); @@ -858,10 +736,10 @@ public class DelayQueueTest extends JSR1 assertTrue(q.contains(elems[1])); l.clear(); q.drainTo(l); - assertEquals(q.size(), 0); - assertEquals(l.size(), 2); + assertEquals(0, q.size()); + assertEquals(2, l.size()); for (int i = 0; i < 2; ++i) - assertEquals(l.get(i), elems[i]); + assertEquals(elems[i], l.get(i)); } /** @@ -883,40 +761,25 @@ public class DelayQueueTest extends JSR1 } /** - * drainTo(null, n) throws NPE - */ - public void testDrainToNullN() { - DelayQueue q = populatedQueue(SIZE); - try { - q.drainTo(null, 0); - shouldThrow(); - } catch (NullPointerException success) {} - } - - /** - * drainTo(this, n) throws IAE - */ - public void testDrainToSelfN() { - DelayQueue q = populatedQueue(SIZE); - try { - q.drainTo(q, 0); - shouldThrow(); - } catch (IllegalArgumentException success) {} - } - - /** - * drainTo(c, n) empties first max {n, size} elements of queue into c + * drainTo(c, n) empties first min(n, size) elements of queue into c */ public void testDrainToN() { for (int i = 0; i < SIZE + 2; ++i) { DelayQueue q = populatedQueue(SIZE); ArrayList l = new ArrayList(); q.drainTo(l, i); - int k = (i < SIZE)? i : SIZE; - assertEquals(q.size(), SIZE-k); - assertEquals(l.size(), k); + int k = (i < SIZE) ? i : SIZE; + assertEquals(SIZE-k, q.size()); + assertEquals(k, l.size()); } } - + /** + * remove(null), contains(null) always return false + */ + public void testNeverContainsNull() { + Collection q = populatedQueue(SIZE); + assertFalse(q.contains(null)); + assertFalse(q.remove(null)); + } }